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<div class="subTitle">randoop.util</div>
<h2 title="Interface SimpleList" class="title">Interface SimpleList&lt;T&gt;</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><a href="../../randoop/util/ListOfLists.html" title="class in randoop.util">ListOfLists</a>, <a href="../../randoop/util/OneMoreElementList.html" title="class in randoop.util">OneMoreElementList</a>, <a href="../../randoop/util/SimpleArrayList.html" title="class in randoop.util">SimpleArrayList</a></dd>
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<pre>public interface <span class="typeNameLabel">SimpleList&lt;T&gt;</span></pre>
<div class="block">Stores a sequence of items, much like a regular <code>List</code>. Subclasses exist that permit
 efficient appending and concatenation:

 <ul>
   <li><a href="../../randoop/util/SimpleArrayList.html" title="class in randoop.util"><code>SimpleArrayList</code></a>: a typical list is stored as an array list.
   <li><a href="../../randoop/util/ListOfLists.html" title="class in randoop.util"><code>ListOfLists</code></a>: a list that only stores pointers to its constituent sub-lists.
   <li><a href="../../randoop/util/OneMoreElementList.html" title="class in randoop.util"><code>OneMoreElementList</code></a>: stores a SimpleList plus one additional final element.
 </ul>

 <p>IMPLEMENTATION NOTE

 <p>Randoop's main generator (<a href="../../randoop/generation/ForwardGenerator.html" title="class in randoop.generation"><code>ForwardGenerator</code></a>)
 creates new sequences by concatenating existing sequences and appending a statement at the end.
 When profiling Randoop, we observed that naive concatenation took up a large portion of the
 tool's running time, and the component set (i.e. the set of stored sequences used to create more
 sequences) quickly exhausted the memory available.

 <p>To improve memory and time efficiency, we now do concatenation differently.

 <p>When concatenating N Sequences to create a new sequence, we store the concatenated sequence
 statements in a ListofLists, which takes space (and creation time) proportional to N, not to the
 length of the new sequence.

 <p>When extending a Sequence with a new statement, we store the old sequence's statements plus
 the new statement in a <code>OneMoreElementList</code>, which takes up only 2 references in memory
 (and constant creation time).</div>
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<td class="colFirst"><code><a href="../../randoop/util/SimpleList.html" title="type parameter in SimpleList">T</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../randoop/util/SimpleList.html#get-int-">get</a></span>(int&nbsp;index)</code>
<div class="block">Return the element at the given position of this list.</div>
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<td class="colFirst"><code><a href="../../randoop/util/SimpleList.html" title="interface in randoop.util">SimpleList</a>&lt;<a href="../../randoop/util/SimpleList.html" title="type parameter in SimpleList">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../randoop/util/SimpleList.html#getSublist-int-">getSublist</a></span>(int&nbsp;index)</code>
<div class="block">Return a sublist of this list that contains the index.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../randoop/util/SimpleList.html#isEmpty--">isEmpty</a></span>()</code>
<div class="block">Test if this list is empty.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../randoop/util/SimpleList.html#size--">size</a></span>()</code>
<div class="block">Return the number of elements in this list.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../randoop/util/SimpleList.html" title="type parameter in SimpleList">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../randoop/util/SimpleList.html#toJDKList--">toJDKList</a></span>()</code>
<div class="block">Returns a java.util.List version of this list.</div>
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<h4>size</h4>
<pre>int&nbsp;size()</pre>
<div class="block">Return the number of elements in this list.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of elements in this list</dd>
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<pre>boolean&nbsp;isEmpty()</pre>
<div class="block">Test if this list is empty.</div>
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<h4>get</h4>
<pre><a href="../../randoop/util/SimpleList.html" title="type parameter in SimpleList">T</a>&nbsp;get(int&nbsp;index)</pre>
<div class="block">Return the element at the given position of this list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>index</code> - the position for the element</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the element at the index</dd>
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<h4>getSublist</h4>
<pre><a href="../../randoop/util/SimpleList.html" title="interface in randoop.util">SimpleList</a>&lt;<a href="../../randoop/util/SimpleList.html" title="type parameter in SimpleList">T</a>&gt;&nbsp;getSublist(int&nbsp;index)</pre>
<div class="block">Return a sublist of this list that contains the index. Does not necessarily contain the first
 element.

 <p>The result is always an existing SimpleList, the smallest one that contains the index.
 Currently, it is always a <a href="../../randoop/util/SimpleArrayList.html" title="class in randoop.util"><code>SimpleArrayList</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>index</code> - the index into this list</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the sublist containing this index</dd>
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<h4>toJDKList</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../randoop/util/SimpleList.html" title="type parameter in SimpleList">T</a>&gt;&nbsp;toJDKList()</pre>
<div class="block">Returns a java.util.List version of this list. Caution: this operation can be expensive.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util"><code>List</code></a> for this list</dd>
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